Do title records --day48

"Algorithm Notes" Section 3.6 - Getting Started Analog -> string processing

A no difficulty, attention is at a plus \ 0 character after the end of that occupation [0, len1-1], then the \ 0 in the len1

At the beginning of strlen do not directly determine the \ 0 before you can determine the length

#include<stdio.h>
#include<string.h>
int main()
{
    char a[1000];
    char b[1000];
    while(scanf("%s %s",a,b)!=EOF)
    {
        int len1,len2;
        len1=0;len2=0;
        while(a[len1]!='\0')
            len1++;
        while(b[len2]!='\0')
            len2++;
        //printf("len1:%d len2:%d\n",len1,len2);
        for(int i=0;i<=len2-1;i++)
            a[i+len1]=b[i];
        a[len1+len2]='\0';
        printf("%s\n",a);
    }
    return 0;
}

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